Jim Simons Renaissance Technologies
Jim Simons is the founder of Renaissance Technologies, one of the most successful quantitative hedge funds in the world. Before his career in finance, he served as a mathematics professor and made significant contributions to differential geometry. Simons applied his analytical expertise to develop sophisticated, algorithm-driven trading strategies, earning consistently high returns for investors.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class A
GOOGL
|
+$546M |
| 2 |
Microsoft
MSFT
|
+$480M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$362M |
| 4 |
Meta Platforms (Facebook)
META
|
+$350M |
| 5 |
Coca-Cola
KO
|
+$266M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Robinhood
HOOD
|
+$1.04B |
| 2 |
Palantir
PLTR
|
+$800M |
| 3 |
Apple
AAPL
|
+$516M |
| 4 |
Netflix
NFLX
|
+$326M |
| 5 |
NVIDIA
NVDA
|
+$313M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 21.71% |
| 2 | Healthcare | 15.16% |
| 3 | Consumer Discretionary | 11.81% |
| 4 | Communication Services | 10.53% |
| 5 | Financials | 9.27% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
826
BlackBerry
BB
$5.27B
| $16.4M | 0.02% |
3,363,043
-5,742,200
| -63% | -$22.8M |
|
827
First Trust Preferred Securities and Income ETF
FPE
$6.34B
| $16.4M | 0.02% |
898,623
+193,885
| +28% | +$3.5M |
|
828
CareTrust REIT
CTRE
$9.18B
| $16.4M | 0.02% |
472,500
-384,838
| -45% | -$12.7M |
|
829
Sensient Technologies
SXT
$5.53B
| $16.4M | 0.02% |
174,400
+133,352
| +325% | +$14.6M |
|
|
APLS
830
DELISTED
Apellis Pharmaceuticals
APLS
| $16.4M | 0.02% |
722,895
+711,907
| +6,479% | +$16.6M |
|
|
USAR
831
USA Rare Earth Inc
USAR
$4.55B
| $16.4M | 0.02% |
+951,400
| New | +$13.6M |
|
832
Selective Insurance
SIGI
$5.59B
| $16.3M | 0.02% |
201,494
-39,000
| -16% | -$3.15M |
|
833
MACOM Technology Solutions
MTSI
$23.7B
| $16.3M | 0.02% |
+131,215
| New | +$17.3M |
|
834
Transmedics
TMDX
$3.02B
| $16.3M | 0.02% |
+145,199
| New | +$17M |
|
835
Boise Cascade
BCC
$2.94B
| $16.3M | 0.02% |
210,249
+64,900
| +45% | +$5.56M |
|
836
BioCryst Pharmaceuticals
BCRX
$2.71B
| $16.2M | 0.02% |
2,140,534
-386,200
| -15% | -$3.22M |
|
837
KT
KT
$8.83B
| $16.2M | 0.02% |
832,593
+432,900
| +108% | +$8.82M |
|
838
SPDR Gold MiniShares Trust
GLDM
$29.8B
| $16.2M | 0.02% |
+211,900
| New | +$14.5M |
|
839
Southwest Gas
SWX
$6.68B
| $16.2M | 0.02% |
206,300
+110,500
| +115% | +$8.61M |
|
840
MSC Industrial Direct
MSM
$6.67B
| $16.1M | 0.02% |
175,200
-62,400
| -26% | -$5.57M |
|
841
Affiliated Managers Group
AMG
$9.57B
| $16M | 0.02% |
67,300
+22,900
| +52% | +$5.05M |
|
842
Aurinia Pharmaceuticals
AUPH
$2.06B
| $16M | 0.02% |
1,449,600
+291,800
| +25% | +$3.19M |
|
843
Metallus
MTUS
$900M
| $16M | 0.02% |
968,833
+300
| +0% | +$4.89K |
|
844
Calix
CALX
$2.51B
| $16M | 0.02% |
260,818
+23,200
| +10% | +$1.34M |
|
845
Cytokinetics
CYTK
$10.5B
| $15.9M | 0.02% |
289,967
+279,800
| +2,752% | +$11.5M |
|
846
Haverty Furniture Companies
HVT
$441M
| $15.9M | 0.02% |
724,206
+6,600
| +0.9% | +$147K |
|
847
ResMed
RMD
$32.8B
| $15.9M | 0.02% |
58,000
-45,000
| -44% | -$12.3M |
|
848
Cooper-Standard Automotive
CPS
$490M
| $15.9M | 0.02% |
429,500
+87,700
| +26% | +$2.67M |
|
849
Nektar Therapeutics
NKTR
$2.57B
| $15.8M | 0.02% |
278,541
+31,481
| +13% | +$1.04M |
|
850
LeMaitre Vascular
LMAT
$1.88B
| $15.8M | 0.02% |
180,602
+21,902
| +14% | +$1.96M |
|
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Jim Simons's Q3 2025 Portfolio in Review
As of Q3 2025, Jim Simons held 4,038 positions worth $75.8B, up 0.77% from $75.2B the previous quarter. Its ten largest holdings account for 11% of the portfolio.
Jim Simons withdrew a net $5.41B in Q3 2025, closing 581 positions and reducing 1,457 holdings. Its most notable exit was GE Aerospace, an estimated $235M position sold in full.
By sector, the portfolio is most concentrated in Technology at 22% of assets, up from 20% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Jim Simons opened a new position in Alphabet (Google) Class C worth $419M.
- Jim Simons's largest Q3 2025 buy was Alphabet (Google) Class C: 1,720,002 shares worth $419M.
- Jim Simons added most to Alphabet (Google) Class A in Q3 2025, an estimated $546M increase.
- Jim Simons's biggest Q3 2025 reduction was Robinhood, cutting an estimated $1.04B.
- Jim Simons fully exited GE Aerospace in Q3 2025, selling an estimated $235M.
- Jim Simons's ten largest holdings make up 11% of its $75.8B portfolio in Q3 2025.
- Jim Simons opened 516 new positions and closed 581 in Q3 2025.
- Jim Simons's portfolio value rose 0.77% quarter-over-quarter to $75.8B.
Based on Renaissance Technologies's 13F filing for Q3 2025, filed 13 Nov 2025.